Portable heater



FIG. 1 is a right side front perspective view of a portable heatershowing my new design;

FIG. 2 is a left side rear perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a right side elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a rear elevation view thereof; and,

FIG. 7 is a top plan view thereof.

The broken line showing of a top front grill, front control and bottomfront grill are included for the purpose of illustrating environmentalstructure and forms no part of the claimed design.

CLAIM The ornamental design for a portable heater, as shown anddescribed.